A small cory catfish, a type of freshwater fish popular in aquariums.
From 'cory' (short for Corydoras, a genus of catfish) + diminutive suffix '-let', which comes from Old English and indicates something small.
Corydoras catfish got their common name 'cory' because scientists noticed they make clicking sounds with their pectoral fins—the Greek root literally means 'helmet' because of their armored head plates, but aquarium hobbyists shortened it to a cute, friendly term.
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